Answer:
C 1/2
Step-by-step explanation:
There are 4 suits, 2 suits are  red (hearts and diamonds) while 2 are black (clubs and spades)
Since 13 cards are in each suit, 26 cards are red ( 2 * 13) Â
There are 52 total cards
P (red) = red cards/ total cards
      = 26 / 52
      = 1/2